The Saying 'Once A Cheater Always A Cheater' May be True, According To Science

We've all heard the saying "once a cheater always a cheater", but according to the team at AsapScience, this commonly used expression may have "a basis in reality".

They say the gene coding for our dopamine receptor plays a key role in cheating for men and women.

Dopamine - sometimes called "the happy hormone" - is released when we engage in pleasurable activities, such as eating food and having sex.

Everyone has a dopamine receptor, but the gene comes in two forms - some people have the long allele variant while others have the short allele variant.

According to the video, one US study found that 50% of people with the long allele variant of the gene had cheated on a partner, compared to just 22% of people who had the short allele variant of the gene.

People with the long allele gene were also found to be more likely to take risks and succumb to addictive behaviours when compared to their short gene counterparts.